Collapsible former for building tire-casings.



J; D. TEW. COLLAPSIBLE FORMER FOR BUILDING TIRE CASINGS. APPLICATIONFILED JUNE 27,1913.

1,198,790. Patented Sept. 19,1916.

%M @m 6y more particularly to an improved collapsiin sraan near a: ham

t me,

JAMEs D. crew, or AKRON, OHIO.

COLLAPSIBLE FORMER FOR BUILDING TIRE-CASINGS.

Specification of Letters Patent. 1 Patented Sept. '19, 1916.

Application'filed June 27, 1913. Serial No. 776,060.

.To all whom it may concern 1 Be it known that I, Janine D. Tnw, acitizen of the United States, residing at Akron,

i i in the county of Summit and State of Ohio,

ble former for use in building pneumatic tire casings of the crd'typepreparatory to vulcanizing such casings. In order that pneumatic tirecasings of the type comprislng reinforcing layers of cords maybeeflicient and durable in use, it is essential that the eordsxshould besecurely anchored in the casings and retained under uniform tension soas to impart to the tire maximum strength and low internal friction. Thedegree of perfection of the completed tire, therefore, largely dependsupon the cords in each layer thereof being laid at the samepredetermined angle to the tread of the casing and under equal tension,and also upon the individual cords being securely anchored in the beadsat the inner peripheries of the sides of the casing, so as to prevent-all movement of the cords relatively to each other and to the othermate rials of the casing.

The primary object of my invention is to provide a former for buildingtire casings of the cord type upon which the various elements of thecasing may be conveniently and efliciently assembled, and whichparticularly will insure the layers of the cords being laid uniformlywith relation to each other and being retained in the completedtireunder equal tension.

A further object of my invention is to provide a collapsible former forbuilding tire casings of the cord type around which the cord may becontinuously wound in uniform convolutions to form the reinforcinglayers of cord, and which may be readily removed from within the tirecasing built thereon to permit the subsequcntvulcanizm tion of thecasing.

A still further object of my invention is to provide a collapsibleformer for use in con structing tire casings. which will be simple inconstruction, which may be conveniently removed from thecasing builtthereon, and

which will be efficient in use.

'My lnvention will be more fully disclosed hereinafter with reference-to the accompanying drawing, in which the same is illustrated' asembodied in a convenient and practical form, and in which Figure 1 is aside elevational viewiof the formenwith a portion of the two layers ofcord windings indicated thereon; and Fig.

2, a cross sectional'view on anenlarged scale through the former andthrough the two layers of cord wound thereon.

- The same reference characters are used to designate the sameparts inthe two figures of the drawing.

Reference characters A, B, B and C designate sections of my improvedformer,

such sections when assembled-as shown in Fig. 1making an annular formerof the cross section and dimensions desired for the tire casing to bebuilt thereon.

One of the sections A of the former is sembled. In order'to retain thering D in engagement with the outer periphery of the sections of theformer, a longitudinal groove (1 is preferably formed in the peripheryof the former of acres? -section conforming to that of the ring D, sothat the latter may fit withinv the same, as shown in Fig. 2. Theouter-surface of the ring D is of a transverse cin-rature conforn'iingto the curvature of the outer periphery of the former. The ring l) ispreferably made in sections correspond ing in number to the sections ofthe former; The sections of the ringD secured to the side members B andB of the former, project slightly beyond the ends of said sections ofthe former so as to overlie the adj acent ends of the intermediatesections A and C of the former. By reference to Fig. 1 of the draw ing,it can beseen that one end of the section ofthe ring D'which is securedto the alined relation, as shown in Fig. 1.

section B of the former, extends at d over the adjacent end of thesection A of thetormer, while the opposite end of the section of thering D, which is secured to the section B of the former, projects to thepoint (Z over the adjacent end oi the section C of the former. In asimilar manner the opposite ends of the section of the ring D, which issecured to section B of the former, extends beyond the ends of saidsection of the former to the points designated d and (Z so that saidsection of the ring D overlaps the adjacent ends of the sections A and Cof the former. Any suitable fastening device such, for instance, asscrews (Z secure the sections of the ring D within the groove cl, formedin the outer sin-tare of the sec tions 01' the former. Secured to andprojecting radially from the ring D are pins E uniformly spaced withrelation to-each other.

1 designates a ring'having an exterior diameter equal to the interiordiameter of the former when the sections thereof are in The outersurface of the ring F is preferably flat so as to be movable laterallyinto and outot position within the sections of the former. The ring I isdctachably retained in position within the former by any suitablefastening devices, such, for instance, as spaced screws ,1'. A groove His formed in the inner periphery of the ring F to i'acilitate cuttingthe convolutions ot the cords, as will subsequently be described.Secured to and projecting radially inwardly from the ring F are pins (iuniformly spaced with relation to each other, and correspmiding innumber to the pins IC projecting outwardly around ti 1e ring D.

v The manner ct using my improved collapsible former is as follows: Thesections are placed in ahncment with each other to form a completicirclewith the adjoining ends of the sections in direct engagement with eachother. he sections A and (l are engaged with the ends of the sections ofthe ring l) which project beyond their opposite ends, whereby tiresections of the former are maintained in (-lrcula ahncment with eachother; ll lllf'illltl' ring l is then moved laterally to a p isitionaround thc inner lit? riphery ot the former. so as to retain thesections thereof in alinement preparatory to having a tire casing builtthereon. The screws f are then inserted through the ring 1 intoengagement with therespectivc sections so as to lctain the former incondition for use. A cord L is then wound around the former incontinuous COItYOlHlLlOHS so as to form a layer completely surroundingthe former. The outer and inner rowsof pins serve to retain thesuccessiveconvolutions at the desired angle to each other and to theformer. For instance, the cord L is placed between the adjacent innerpins 9 and g.

The cord is then passed around the outer surface of the former betweenthe adjacent outer pins and c and thence through the former againbetween the adjacent inner I pins and In this manner the Winding ot' thecord L continues until a layer of con volutions has been formedcompletely around the former. An outer layer of cord is then woundaround the inner layer, but with the convolutions thereof inclined in anopposite direction, so that the planes of the conrolutions of the outerlayer intersect the planes of the convolutions of the inner layer. Forinstance, the cord M is placed between the adjacent outer pins e" and eand then passed through the former between the pins y and y, and thencearound the outer periphery of the former between the adjacent pins (1and 0 The winding then continues inwardly around the former between theadjacent inner pins g and 9 In this manner a second layer of cord isformed around the former, and if desired, other layers of cord may beformed in the same manner by winding the cord around the former with theconvolutions of each layer crossing the con- \olutions of the overlyingand underlying layers. The pins which project radially outwardly from.the ring D and radially inwardly from the ring F, retain theconvolutions of cord in proper spaced relation and enable,the cord to bewound around the former under equal tension throughout all of theconvolutions. The building up of the tire casing is then continued byapplying beads on the opposite sides of the layer adjacent the innerperiphery of the former. and the application of rubber to the sides andaround the tread. These parts are not shown, as they are unnecessary inorder that the construction and method of using my improved collapsibleformer may be fully understood. After the entire casing has been builtup around the former, the layers of cord are severed along the innerperiphery of the former which may be facilitated by the groove H in theinner periphery l of the inner ring F which serves as a guide for aknife used in severing the successive convolh'itions of cord forming thelayers. The inner severed ends of the cords in the layers are thentoldedoutwardly so as to permit the removal of the inner ring F which isaccom-.'

plished by taking out the screws f and then moving the ring laterallyfrom its position within the sections of the former. The seccasin 'lb'sections of the former may then be ,vmbled in alinement by means of theouter and inner rings preparatory to using he same for building anothertire casing. thereon.

From the foregoing description it will be observed that I have inventedan improved former 'for use in building pneumatic tire casings of thecord type, by means of which the cord forming the layers'may beconveniently and accurately arranged in convolutions uniformly arrangedwith relation to each other and at the same angle with relation to thecasing. It will be further observed that by the use of my improvedformer an equal tension may be imparted to the convolutions of the cordforming the layers, thereby materially contributing to the durabilityand elliciency ot' the tire casing when completed. The construction ofmy improved former is such as to permit it to be readily removed fromthe casing built thereon, and the parts thereof again assembled inoperative relation for re-use.

\Vhat I claim is:

- I l a l 1. A (Z*I)ll21pSll)l annular iormcr for building tire casings,having a longitudinal series of outwardly around the outer peripherythereof, and a longitudinal series of inwardly projecting equi-distautpins around the inner periphery thereof.

2. T he combination with a collapsible former for building tire casings,comprising a plurality of inwardly separable sections, of means forsupporting a longitudinal series of outwardly projecting pins on theouter periphery of said former, and a removable ring fitting within theinner periphery said former and carrying a longitudinal ries of inwardlyprojecting pins,

3. The con'1bination with a collapsible former for building tirecasings, comprising a pliiirality of. inwardly separable sections, of aring surrounding the outer periphery of said sections and carrying a,longitudinal'series of outwardly projecting pins, and a removable ringfitting within the inner periphery of said former and carrying a dinalseries of inwardly projecting pins.

4. lhe combination with a collapsible former for building tire casings,comprising a plurality of inwardly separable sections having acontinuous longitudinal groove in their outer peripheries, of a ringsurround ing the outer periphery of the sections of said former andseated within said groove, a series of outwardly projecting pins carriedby said ring, a removable ring fitting within the inner periphery oisaid former, and a longitudinal series of inwardly projecting pinscarried by said second ring.

The combination with a collapsible former for building tire casings,comprising a plurality of inwardly separable sections, of

projecting equi-distant P1115.

longitumeans for supporting a longitudinal series of outwardlyprojecting pins on the outer periphery of said former, a laterallyremovable ring fitting within of said former for retaining the sectionsthereof in alined relation, means for detachably securing said ring tothe inner peripheries ot the sections of the former, said ring having alongitudinal groove in its inner surface, and a longitudinal series ofin.- wardl y projecting pins carried by said rin 6. The combination witha collapsible former for building the casings, comprising a plurality ofmovable separable sections, having acontinuous longitudinal groove intheir outer surfaces, of a ring surrounding the outer periphery of saidsections and seated within said groove, a longitudinal series ofoutwardly projecting pins carried by said ring, a laterally movableinner ring fitting within said .tormer and retaining the sectionsthereo't in engagement with'said outer ring, means tor detachablysecuring said inner ring tothe several sections of the former, and alongitudinal series or inwardly pro ecting pins carried by said innerring.

7. A collapsible annular former for building tire casings, having alongitudinal series of projections extending radially around the outerperiphery thereof.

8. A collapsible annular tormer for building tire casings, having alongitudinal series of projections extending radially inward around theinner periphery thereof.

9. A collapsible annular former for building tire casings having alongitudinal series of projections extending radially outwar around theouter periphery thereof and a longitudinal series of projectionsextending radially inward around the inner thereof.

10. A collapsible annular former for building tire casings provided withdetachable circuinterentially extending means for carrying longitudinalrow of equi-distant pins around its outer periphery.

11. A collapsible annular former for building tire casings provided withdetachable c1rcumiercntially extending means for carrying a longitudinalrow of emu-distant pins around its inner periphery.

12. A collapsible annular former r'orbuilding tire casings havingdetachable circumterentially extending means'for carrying a longitudinalrow of equi-distant projecting pins adapted to properly space cordsaround about the former. 1

13. A collapsible annular former having a row of equi-distant pins onits outer periphery and a row of equi-distant pins on its innerperiphery, there being substantially the same number of pins in the tworows.

14. The combination, with a collapsible former for building tire casingscomprising the. inner periphery periphery a plurality of inwanllyseparable sections 16. A former for building tire casings, hnvlng acont-muons longltudmal groove 1n szucl former belng provlded with twodifferthenouter pcnphenes, of a, mng smrrounclently posltlonedlongltucllnal rows of equling the outer periphery of the sections of a Dt e pins of one row being 1 5 snill former 21ml seated Within saidgroove, spaced differently from those of the other and a. serles ofoutwardly progecmng plns row.

carried by said rin I ME D m v 1 1E 14 A collapslble annular former forbullcl- S mg" lure casings pmvinled with a penphel'nl Wnbnesses: 10groove, and a mng adapted to seat- 111 szud J. V. BLAKE,

groove and having projechlng pins. C. M. \VYLIE.

